Preparation method of cobalt molybdate photocatalyst

A photocatalyst, cobalt molybdate technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Good dispersion, uniform crystal structure, good catalytic effect

Inactive Publication Date: 2017-12-29
柳州若思纳米材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanoparticles are easy to agglomerate, and after agglomeration, the surface area is greatly reduced, and the effect is weakened.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Add 5 g of cobalt dichloride to 100 mL of water to prepare a solution, then add 8 g of sodium molybdate and 1 g of glycine to the solution, stir in a water bath at 70°C for 50 minutes, continue stirring for 10 minutes, then transfer the solution to In a hydrothermal reactor, react at 260 °C for 10 h, filter to obtain a solid, wash 5 times with distilled water, and dry at 80 °C to obtain a cobalt molybdate photocatalyst.

[0010] 0.4 g of cobalt molybdate photocatalyst was added to 200 mL of methylene blue wastewater with a concentration of 30 mg / L, and reacted for 90 min under the irradiation of a 120W LED lamp, and the decolorization rate was 96.5%. After the catalyst was separated and reused 5 times, the same conditions The reaction time was 90 min, and the decolorization rate was 90.1%.

Embodiment 2

[0012] Add 10 g of cobalt dichloride to 50 mL of water to prepare a solution, then add 11 g of sodium molybdate and 2 g of glycine to the solution, stir in a water bath at 60°C for 10 minutes, continue to stir for 5 minutes, and then transfer the solution to In a hydrothermal reactor, react at 180°C for 5 h, filter to obtain a solid, wash with distilled water three times, and dry at 80°C to obtain a cobalt molybdate photocatalyst.

[0013] 0.4 g of cobalt molybdate photocatalyst was added to 300 mL of acid scarlet wastewater with a concentration of 30 mg / L, and reacted for 90 min under the irradiation of a 120W LED lamp, and the decolorization rate was 98.1%. After the catalyst was separated and reused for 5 times, the same Under these conditions, the reaction time was 90 min, and the decolorization rate was 94.2%.

Embodiment 3

[0015] Add 6 g of cobalt dichloride to 100 mL of water to prepare a solution, then add 9 g of sodium molybdate and 2 g of glycine to the solution, stir in a water bath at 70°C for 40 minutes, continue stirring for 10 minutes, and transfer the solution to In a hydrothermal reactor, react at 260 °C for 10 h, filter to obtain a solid, wash 5 times with distilled water, and dry at 80 °C to obtain a cobalt molybdate photocatalyst.

[0016] 0.4 g of cobalt molybdate photocatalyst was added to 300 mL of Rhodamine B wastewater with a concentration of 30 mg / L, and reacted for 90 min under the irradiation of a 120 W LED lamp. The decolorization rate was 98.3%. After the catalyst was separated and reused 5 times , under the same conditions, the reaction time was 90 min, and the decolorization rate was 94.1%.

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Abstract

The invention discloses a preparation method of a cobalt molybdate photocatalyst. The method comprises the following steps: adding 5-10g of cobalt dichloride into 50-100mL of water to prepare a solution; adding 8-11g of sodium molybdate and 1-2g of glycine into the solution; stirring for 10-50min in water bath at the temperature of 60-70 DEG C; continuously stirring for 5-10min, and then transferring the solution into a hydrothermal reactor to react for 5-10h at the temperature of 180-260 DEG C; filtering to obtain a solid; washing three to five times with distilled water; and drying at temperature of 80 DEG C to obtain the cobalt molybdate photocatalyst. The method has the advantages that the obtained cobalt molybdate crystal structure is uniform, high in dispersing performance, and good in catalyzing effect.

Description

technical field [0001] The invention relates to the field of new materials for environmental pollution control, in particular to a preparation method of cobalt molybdate photocatalyst. Background technique [0002] With the development of science and technology, toxic organic pollutants from industrial and agricultural production seriously threaten the environment and human health. It is of great significance to seek a new and efficient environmental governance technology. Photocatalytic technology has become an emerging environmental treatment technology with important application prospects due to its advantages of energy saving, high efficiency, complete pollutant degradation, and no secondary pollution. In recent years, the development of new and efficient visible light photocatalysts has become an important research content in photocatalytic technology. Among them, photocatalytic materials with surface plasmon resonance effect, because of their unique surface physical an...

Claims

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Application Information

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IPC IPC(8): B01J23/882C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J23/002B01J23/882C02F2101/36C02F2101/34C02F2101/38C02F2101/40C02F2101/308C02F2305/10B01J35/39
Inventor 程昊白大伟郝光明史智鹏
Owner 柳州若思纳米材料科技有限公司
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